Question

Lin’s father is paying for a meal that originally costs $20. He has a 30%-off coupon for the meal. After the discount, a 7% sales tax is applied. What does Lin’s father pay for the meal? Explain your thinking.

Answer 1

10% of $20 = $2
30% of $20 = $6
$20-$6 = $14
1% of $14 = 0.14
7% of $14 = $0.98
$14 + $0.98 = $14.98

therefore lin’s father pays $14.98 for the meal.